Kähler, Paul (1991) Eutrophication and sediment denitrification in coastal marine waters, the example of Kiel Bight. Kieler Meeresforschungen - Sonderheft, 8 . pp. 112-116.

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Abstract

Denitrification rates were measured by the acetylene blockage method in the various sediment types occurring in Kiel Bight, namely sand, muddy sand, and mud, during the course of almost two years. Nitrate concentration in the sediments was found to be the major factor controlling denitrification. The source of the nitrate is nitrification in the sediments themselves. Nitrification there is mainly controlled by oxygen supply. In this way, the anaerobic process of denitrification indirectly requires oxygen. Anoxic muds have hence the lowest, oxic sands the highest denitrification rates. Effects of eutrophication like increased supply of nitrogen and organic matter to the sediments and the increased incidence of anoxia in the bottom water tend to reduce denitrification in such a situation.

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